Forming tool apparatus with pivoting wall segment

Details Forming tool apparatus with pivoting wall segment Forming tool apparatus with pivoting wall segment

2007-12-11

2007-12-11

Gupta, Yogendra N. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Shaping surface including means to release or remove product...

By movable mold sections

C425S556000, C425SDIG058

Reexamination Certificate

active

11206552

ABSTRACT:
An improved forming tool apparatus for forming an article having a negative draft angle that locks the formed article within the forming tool. First and second forming tools are closed relative one another to define a forming tool cavity in which the article is formed and opened for removal of the formed article from the forming tool cavity. The first forming tool has a removable cavity wall segment having an undercut cavity wall that provides a desired shape to the formed article but locks the formed article against removal from the forming tool cavity. A pivot linkage normally establishes the removable wall segment in a forming position in which the undercut wall is poised for forming of the article and selectively pivots the removable wall segment out of the forming position when the forming tools are opened so that the undercut wall is pivotally lifted and releases the formed article for removal from the cavity.

REFERENCES:
patent: 2784455 (1957-03-01), Pulaski
patent: 3642416 (1972-02-01), Miller
patent: 3753641 (1973-08-01), Turner et al.
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patent: 4101256 (1978-07-01), White et al.
patent: 5037289 (1991-08-01), Ohta et al.
patent: 6454554 (2002-09-01), Lopez et al.

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